#! /bin/sh
# Merge pkg-config macros into Emacs sources.
# Typical usage:
#
#	admin/merge-pkg-config

# Copyright 2014-2025 Free Software Foundation, Inc.

# This file is part of GNU Emacs.

# GNU Emacs is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# GNU Emacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

# written by Paul Eggert

{
  # Maybe ACLOCAL_PATH is already set-up.
  oIFS=$IFS
  IFS=:
  for dir in $ACLOCAL_PATH ''; do
    test -n "$dir" && test -r "$dir/pkg.m4" && break
  done
  IFS=$oIFS

  test -n "$dir"
} || {
  # Use the pkg.m4 installed where aclocal knows about it.
  # Maybe we are running our own aclocal, which doesn't know where
  # the standard pkg.m4 is installed, so try running all the
  # aclocal programs in our PATH.
  oIFS=$IFS
  IFS=:
  for dir in $PATH ''; do
    if test -n "$dir" && test -x "$dir/aclocal"; then
      dir=$("$dir/aclocal" --print-ac-dir) && test -r "$dir/pkg.m4" && break
    fi
  done
  IFS=$oIFS

  test -n "$dir"
} || {
  printf >&2 '%s\n' "$0: cannot find pkg.m4"
  exit 1
}

test -d m4 || {
  printf >&2 '%s\n' "$0: please run this command in the main source directory"
  exit 1
}

printf >&2 '%s\n' "$0: copying $dir/pkg.m4 to m4/pkg.m4"

cp "$dir"/pkg.m4 m4
